Abstract: In the non-contact body measurement system,how to obtain the bust size is a pivotal problem.The paper uses the grey link analysis theory to determine stature,body weight, bust breadth and bust circumference for the basic elements of the bust grey model.And according to the classification of TNF index, the grey models of human bust are established.The work has got good effect in forecasting,laying a foundation for realization of the non-contact body measurement system.